42565020 has 24 divisors (see below), whose sum is σ = 119182224. Its totient is φ = 11350656.

The previous prime is 42565009. The next prime is 42565031. The reversal of 42565020 is 2056524.

42565020 = 1012² + 1013² + ... + 1051².

It is an interprime number because it is at equal distance from previous prime (42565009) and next prime (42565031).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354649 + ... + 354768.

It is an arithmetic number, because the mean of its divisors is an integer number (4965926).

Almost surely, 2^42565020 is an apocalyptic number.

It is an amenable number.

42565020 is an abundant number, since it is smaller than the sum of its proper divisors (76617204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42565020 is a wasteful number, since it uses less digits than its factorization.

42565020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709429 (or 709427 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 42565020 is about 6524.1873057110. The cubic root of 42565020 is about 349.1544760495.

The spelling of 42565020 in words is "forty-two million, five hundred sixty-five thousand, twenty".